The GDAC ftp mirror site by JAMSTEC is no longer available. Please access France GDAC or US GDAC to download Argo data.
GDACs (Global Data Assembly Centres) are operated by IFREMER (France) and FNMOC (U.S.A), and deliver all Argo float data, synchronizing each other.You should click here to access the data.
Argo float data are basically described with netCDF fotmat (Network Common Data Form). General information of netCDF can be learned from following site netCDF(Network Common Data Form)
What is Argo data?・・・ Argo User's Manual [PDF]
Detailed information is shown at the web site of Argo data management team.
Argo data are freely available for everyone. JAMSTEC will appreciate you if you describe or notify about use of Argo in your article, paper and other products in following method to be able to sustain the Argo program. Thank you !
ADMT (Argo Data Management Team) offers Digital Object Identifiers(DOIs) for every Argo data and products. For more information please visit the web site of Argo DOI.
"These data were collected and made freely available by the International Argo Program and the national programs that contribute to it. (http://www.argo.ucsd.edu, http://argo.jcommops.org). The Argo Program is part of the Global Ocean Observing System."
The other documents about Argo data are avalable from here.